Question

Calcule As Expressoes

a.8:2+[15-(4×2+1)]
b.9+[4+2x(6-4)+(2+5)]-8

Answer 1

Oi,

a) 
8 ÷ 2 + [15 - (4 × 2 + 1)] =
   8 ÷ 2 + [15 - (8 + 1)] =
       8 ÷ 2 + [15 - 9] =
            8 ÷ 2 + 6 =
               4 + 6 =
                 10

b) 
9 + [4 + 2 × (6 - 4) + (2 + 5)] - 8 =
9 + [4 + 2 × 2 + (2 + 5)] - 8 =
9 + [4 + 2 × 2 + 7] - 8 =
9 + [4 + 4 + 7] - 8 =
9 + [8 + 7] - 8 =
9 + 15 - 8 =
24 - 8 =
16

Espero ter ajudada(o) e bons estudos